The world’s first thermocouple thermometer, Model BAT-4, was designed in 1969 by Physitemp Instruments, Inc. It was soon being used in the lab, factory, hospital O.R. and in the field. The new BAT-12 has evolved from the BAT-4 with many improvements over the years for fitting numerous of applications.
A very rugged and reliable thermometer for high throughput research with readings to 0.1° C - near perfect stability.